The invention belongs to the technical field of automobile detection equipment, and particularly relates to an automatic transmission test bed used for solving the technical problem of poor universality of the automatic transmission test bed in the prior art. The automatic transmission test bed comprises a base frame, an input base, an output base, test devices, a transmission fixing device, a position adjusting device, a power loading device and a control device; the input base is arranged at one end of the top layer of the base frame, and the output base is arranged at the other end; the transmission fixing device is arranged at the end, close to the output base, of the input base, and the test device is arranged at the other end of the input base and on the output base; the adjusting device is arranged between the output base and the top layer of the base frame; the power loading device is arranged at the bottom layer of the base frame; the power loading device is connected with the test device; the power loading device and the test device are respectively connected with the control device; and the position adjusting device comprises a horizontal direction adjusting device and a height adjusting device. Compared with the prior art, the automatic transmission test bed has advantages of adjustability in multiple directions, convenience in operation and high universality.