It doesn't matter if you lose your social security book.

Legal analysis: if the social security book is lost, the laborer can report the loss to the nearest social security agency or reissue it with his ID card (or household registration book). If you want to change to a social security card, you need to provide a one-inch color photo (subject to the photo of the second-generation ID card); If you entrust others to handle it, you need to bring the ID card (or household registration book) of the principal and agent, and the social security card replacement fee is 25 yuan. (According to regulations, the social security card costs 20 yuan for the first time and 25 yuan for the second time. )。

Legal basis: Guidelines for Reissuing Social Security Cards 1. If the social security card is lost, stolen or damaged, it should be reported to the nearest social security agency or replaced with the ID card (or household registration book); 2, the original medical insurance IC card for social security card, but also need to provide a one-inch color photo (based on the second-generation ID card photo); 3. If you entrust others to handle it, you should bring the ID card (or household registration book) of the principal and agent; 4. The expenses incurred during the loss or damage of the social security card shall be reimbursed at one time after examination, which is the latest medical expenses incurred before the loss is reported for replacement.