str='{\"address\":\"\\u5e7f\\u4e1c\\u7701\\u5e7f\\u5dde\\u5e02\\u5929\\u6cb3\\u533a\\u5929\\u5e9c\\u8def1\\u53f7\",\"address_component\":{\"nation\":\"\\u4e2d\\u56fd\",\"province\":\"\\u5e7f\\u4e1c\\u7701\",\"city\":\"\\u5e7f\\u5dde\\u5e02\",\"district\":\"\\u5929\\u6cb3\\u533a\",\"street\":\"\\u5929\\u5e9c\\u8def\",\"street_number\":\"\\u5929\\u5e9c\\u8def1\\u53f7\"},\"latitude\":23.112764,\"longitude\":113.426743,\"name\":\"\\u5929\\u6cb3\\u533a\\u5e7f\\u5dde\\u5e02\\u5929\\u6cb3\\u533a\\u4eba\\u6c11\\u653f\\u5e9c(\\u5929\\u5e9c\\u8def\\u897f)\"}'
console.log(unescape(str.replace(/\u/g, "%u")).replace(/\\/g,''));
结果
{"address":"广东省广州市天河区黄埔大道中300号","address_component":{"nation":"中国","province":"广东省","city":"广州市","district":"天河区","street":"黄埔大道中","street_n%umber":"黄埔大道中300号"},"latit%ude":23.112764,"longit%ude":113.426743,"name":"天河区东璟花园(员村二横路西100米)"}
