Disclosed is a stepless speed regulation control mechanism for a lawn mower, comprising a pushing handrail (2), a self-propelled wrench (5), a speed regulation cable (6), and a speed regulation mechanism (7). The lawn mower (1) comprises a base (11) and a self-propelled device (3). The speed regulation mechanism (7) comprises an adjustment sleeve (71) and a speed regulation sleeve (72) which are successively connected to the pushing handrail (2), wherein the adjustment sleeve (71) is connected to the self-propelled wrench (5) and the speed regulation sleeve (72) is connected to the speed regulation cable (6). The self-propelled wrench (5) is able to pull the adjustment sleeve (71) and the speed regulation sleeve (72) to move together so as to further pull the speed regulation cable (6), and the speed regulation sleeve (72) can move relative to the adjustment sleeve (71) so as to further pull the speed regulation cable (6). This stepless speed regulation control mechanism for a lawn mower not only facilitates the speed regulation thereof to provide a convenient stepless speed regulation, but also avoids confusion and misoperation, and has low costs and is easy to machine and operate.L'invention concerne un mécanisme de commande de régulation de vitesse en continu destiné à une tondeuse à gazon, lequel mécanisme comprend une rampe de poussée (2), une clef auto-propulsée (5), un câble de régulation de vitesse (6), et un mécanisme de régulation de vitesse (7). La tondeuse à gazon (1) comprend une base (11) et un dispositif auto-propulsé (3). Le mécanisme de régulation de vitesse (7) comprend un manchon de réglage (71) et un manchon de régulation de vitesse (72) qui sont successivement reliés à la rampe de poussée (2), le manchon de réglage (71) étant relié à la clef auto-propulsée (5) et le manchon de régulation de vitesse (72) étant relié au câble de régulation de vitesse (6). La clef auto-propulsée (5) est apte à tirer le manchon de réglage (71) et le manchon de régul
