An electric transplanter and a method for replacing a power supply device. The electric transplanter comprises a transplanter device (10) and at least one power supply device (20) provided in the transplanter device (10); the power supply device (20) comprises a power supply body (21) and a battery connection unit (22) connected to the power supply body (21); the transplanter device (10) comprises a transplanter body (11), a transplanter connection unit (12), and at least one accommodating body (13), the accommodating body (13) being obliquely provided on the transplanter body (11), and the power supply body (21) being detachably provided in the accommodating space of the accommodating body (13). In this way, once the power supply body (21) runs out of electrical power or is damaged, the power supply body (21) can be conveniently and rapidly replaced, thereby facilitating the continuous use of the electric transplanter.
