Energex workers including meter readers will no longer enter yards with unrestrained dogs after a rise in bites in Queensland.

The company has released several images of their staff with scratches and lacerations from bites to justify the new safety measure from Monday after 71 reported injuries in the past year.

"The safety of our employees has to come first and that means if there's an unrestrained dog on a property, we won't go in to do work of any kind," Energex spokesman Rob Mitchell said.