Load “…\Obj\Laliji.axf”
Set JLink Project File to “F:\01MCU\STM32F429\TestProgram\Project\JLinkSettings.ini”
JLink Info: Device “STM32F429IG” selected.

JLink info:
DLL: V4.98e, compiled May 5 2015 11:00:52
Firmware: J-Link V10 compiled Oct 15 2018 16:40:35
Hardware: V10.10
S/N : 260106173
Feature(s) : FlashBP, GDB, FlashDL, JFlash, RDI
JLink Info: Found SWD-DP with ID 0x2BA01477JLink Info: Found SWD-DP with ID 0x2BA01477JLink Info: Found Cortex-M4 r0p1, Little endian.JLink Info: FPUnit: 6 code (BP) slots and 2 literal slotsJLink Info: CoreSight components:JLink Info: ROMTbl 0 @ E00FF000JLink Info: ROMTbl 0 [0]: FFF0F000, CID: B105E00D, PID: 000BB00C SCSJLink Info: ROMTbl 0 [1]: FFF02000, CID: B105E00D, PID: 003BB002 DWTJLink Info: ROMTbl 0 [2]: FFF03000, CID: B105E00D, PID: 002BB003 FPBJLink Info: ROMTbl 0 [3]: FFF01000, CID: B105E00D, PID: 003BB001 ITMJLink Info: ROMTbl 0 [4]: FFF41000, CID: B105900D, PID: 000BB9A1 TPIUJLink Info: ROMTbl 0 [5]: FFF42000, CID: B105900D, PID: 000BB925 ETM
ROMTableAddr = 0xE00FF003

Target info:
Device: STM32F429IG
VTarget = 3.270V
State of Pins:
TCK: 0, TDI: 1, TDO: 1, TMS: 1, TRES: 1, TRST: 1
Hardware-Breakpoints: 6
Software-Breakpoints: 8192
Watchpoints: 4
JTAG speed: 5000 kHz
No Algorithm found for: 08000000H - 08001073H
Erase skipped!
Error: Flash Download failed - “Cortex-M4”
Flash Load finished at 14:46:07

Solution:
1, click the magic wand of keil interface (Alt + F7)
2, Settings

3, Flash Download -> add

4, choose the type of chip-> add