Disclosed are an onboard spraying system (500) for an agricultural plant protection machine, and an agricultural plant protection machine. The onboard spraying system (500) comprises a fixing rack (510), multiple pump devices (520) and multiple connectors (530), wherein the fixing rack is provided with multiple openings (511), with each opening comprising a first opening (5111) and a second opening (5112) in communication with the first opening (5111), and the aperture of the first opening (5111) being greater than the that of the second opening (5112)； and each connector (530) has a connecting body (531) and a stopping portion (532), with the connecting body (531) being fixedly connected to a corresponding pump device (520), the stopping portion (532) being arranged on the connecting body (531), and the size of the stopping portion (532) being greater than the aperture of the second opening (5112) and less than or equal to the aperture of the first opening (5111), such that the stopping portion (532) can pass through the first opening (5111), but cannot pass through the second opening (5112). When the connector (530) fits with the opening (511), the stopping portion (532) can pass through the first opening (5111), and the connecting body (531) can slide into the second opening (5112) from the first opening (5111), such that the stopping portion (532) is stopped by the periphery of the second opening (5112).L'invention concerne un système de pulvérisation embarqué (500) pour une machine de protection de plante agricole, et une machine de protection de plante agricole. Le système de pulvérisation embarqué (500) comprend un râtelier de fixation (510), de multiples dispositifs de pompe (520) et de multiples connecteurs (530), le râtelier de fixation étant pourvu de multiples ouvertures (511), chaque ouverture comprenant une première ouverture (5111) et une seconde ouverture (5112) en communication avec la première ouverture (5111), et l'ouverture de la première ouvertu
