The invention discloses a trailer for electrical equipment. Chutes (2) are respectively formed in two sides of an underpan (1), a handle (3) is arranged at one side of the underpan (1), the handle (3) is rotationally connected with the underpan (1), the bottom of the underpan (1) is provided with a rolling wheel combination, a left flat plate (4) and a right flat plate (5) are arranged on the underpan (1), left slide rails (6) are arranged at the two sides of the bottom of the left flat plate (4), right slide rails (7) are arranged at the two sides of the bottom of the right flat plate (5), guide posts (8) are arranged between the left flat plate (4) and the right flat plate (5), the left slide rails (6) arranged at the two sides of the left flat plate (4) are placed on the chutes (2), the right slide rails (7) arranged at the two sides of the right flat plate (5) are placed on the chutes (2), the left flat plate (4) moves in the chutes (2), and the right flat plate (5) moves in the chutes (2).