The invention discloses a detection tooling for oil leakage of an engine air compressor. The detection tooling for the oil leakage of the engine air compressor comprises a bottom plate, a cover plate and a clamping plate, wherein the bottom plate is rectangular, a groove is formed in the middle of the bottom plate, and penetrates through one side of the bottom plate; the cover plate has the same shape as the bottom plate, a window consistent with the size of the groove is formed in the middle of the cover plate, the cover plate is attached to the bottom plate and fixed together, the edge part on one side of the cover plate and the groove are buckled together to form a slot, and the slot is provided for test paper to be inserted into the groove; the clamping plate is an L-shaped plate, a through hole is formed in a plate surface at one end of the L-shaped plate to be held by a human hand, and the other end of the L-shaped plate is used for being inserted into the slot to tightly clamp the test paper. The detection tooling is wide in application range and safe and reliable to operate.