Salicylaldehyde hydrazone Zn(II) complex is a kind of promising stimulus responsive luminescent material. In this work, three Zn(II) complexes ( 1a, 1b and 2) based on salicylaldehyde hydrazone were synthesized and characterized. Complexes 1a and 2 exhibit reversible mechanochromic luminescence, and 1a could undergo crystal phase transformation into 1b by slight grinding. The structural analyses and experimental results of these two indicate that grinding may destroy the coordination bond, causing the coordinating pyridine molecule to fall off the complex. Moreover, the DMSO solutions of complexes 1a and 2 both turn from yellow to colorless accompanied with fluorescence quenching after irradiating with white light. 1a shows reversible photochromism, while the response time of 2 is long and irreversible, which may be due to the steric hindrance. However, 2 exhibits more obvious photochromic behavior in the solid state than 1a. Its color changes from yellow to brown upon irradiation with 365 nm UV light, which is due to the radicals generated by photo-induced electron transfer from hydroxyl oxygen atom to coordinating pyridine molecule. The PMMA film of 2 also exhibits photochromic property. The salicylaldehyde hydrazone Zn(II) complexes with MCL and photochromic properties point to the potential applications as multi-stimuli responsive materials.